Case study Questions in Class 9 Science Chapter 13 are very important to solve for your exam. Class 9 Science Chapter 13 Class 9 Science Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 13 Why Do We Fall Ill?
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In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Why Do We Fall ill Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 13 Why Do We Fall ill?
Case Study/Passage-Based Questions
Case Study 1: Refer to the given figure and answer the following questions
Disease which can be transmitted by mode E is
(a) rabies (b) typhoid
(c) dengue (d) tuberculosis.
Answer: (c) dengue
Read the following statement and select the correct statements.
(i) Mode D is the common method of transmission of diarrhea.
(ii) Both modes A and B are responsible for the transmission of the AIDS virus.
(iii) Hepatitis B is spread by mode B only.
(iv) Rabies is transmitted by mode F.
(a) (ii) and (iii) (b) (i), (ii) and (iii)
(c) (i) and (iv) (d) (iii) and (iv)
Answer: (c) (i) and (iv)
Diseases that are transmitted by modes __ are called vector-borne diseases.
(a) B, C and D (b) A and B
(c) C and D (d) E and F
Answer: (d) E and F
Which one of the following diseases is not transmitted by mode E?
(a) Brain fever (b) Malaria
(c) Typhoid (d) Dengue
Answer: (c) Typhoid
Case Study/Passage-Based Questions
Case Study 2: X and Y are communicable diseases where X can spread from an infected person to a healthy person by direct contact between them whereas Y can spread from an infected person to a healthy person through some intermediate agents.
Which of the following pathogen cannot be responsible for causing X?
(a) Streptococcus pneumonia
(b) Ascaris lumbricoides
(c) Plasmodium vivax
(d) All of these.
Answer: (d) All of these.
Which one of the following is an example of ‘X’?
(a) Filariasis (b) Leprosy
(c) Cholera (d) Typhoid
Answer: (b) Leprosy
Which of the following is an example of disease ‘Y’?
(a) Pneumonia (b) Marasmus
(c) Pellagra (d) Goitre
Answer: (a) Pneumonia
Case Study 3: Health is a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity. Various factors contribute to our health and well-being, including a balanced diet, regular exercise, personal hygiene, and a clean environment. However, at times, we may fall ill due to various reasons. Illness can be caused by factors such as infections, poor sanitation, unhealthy lifestyle choices, genetic predisposition, and environmental factors. Infectious diseases are caused by microorganisms such as bacteria, viruses, fungi, and parasites. They can spread from person to person through various modes of transmission. Non-communicable diseases, on the other hand, are not caused by microorganisms but by factors such as genetic disorders, nutritional deficiencies, environmental pollution, and lifestyle habits. Understanding the causes and prevention of various diseases is crucial for maintaining good health and taking appropriate measures to avoid illness.
What is health?
a) The absence of disease or infirmity
b) Complete physical well-being
c) Mental well-being
d) Complete physical, mental, and social well-being
Answer: d) Complete physical, mental, and social well-being
What factors contribute to our health and well-being?
a) Balanced diet and regular exercise
b) Personal hygiene and clean environment
c) All of the above
d) None of the above
Answer: c) All of the above
What are the causes of infectious diseases?
a) Poor sanitation and unhealthy lifestyle choices
b) Genetic disorders and environmental pollution
c) Microorganisms such as bacteria, viruses, fungi, and parasites
d) Nutritional deficiencies and lifestyle habits
Answer: c) Microorganisms such as bacteria, viruses, fungi, and parasites
How do infectious diseases spread?
a) Through genetic predisposition
b) Through unhealthy lifestyle choices
c) Through person-to-person transmission
d) Through environmental pollution
Answer: c) Through person-to-person transmission
What causes non-communicable diseases?
a) Microorganisms such as bacteria and viruses
b) Genetic disorders and environmental pollution
c) Unhealthy lifestyle choices
d) Nutritional deficiencies
Answer: b) Genetic disorders and environmental pollution
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